| 多金属结核中二氧化锰的测定 |
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| 引用本文： | 夏月莲,毛海燕.多金属结核中二氧化锰的测定[J].岩矿测试,1997,16(3):177-179. |
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| 作者姓名： | 夏月莲 毛海燕 |
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| 作者单位： | 地矿部岩矿测试技术研究所 |
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| 摘 要： | 用过量的含有Ｈ２ＳＯ４的（ＮＨ４）２Ｆｅ（ＳＯ４）２溶液分解多金属结核的同时，还原了试样中的ＭｎＯ２，然后以Ｋ２Ｃｒ２Ｏ７标准溶液滴定测定了多金属结核中的ＭｎＯ２。就样品分解过程中的加热温度和时间对测定结果的影响及标准溶液的标定等问题进行了讨论，经多次测定，方法重现性好。应用此方法为新研制的多金属结核标准物质提供了ＭｎＯ２的定值数据，其结果与初定值相符，无剔除值，精密度（ＲＳＤ，ｎ＝８）小于０６％。
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| 关 键 词： | 二氧化锰 多金属结核 容量法 标准物质 |
Determination of Manganese Dioxide in Oceanic Polymetallic Nodules |
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| Xia Yuelian,Mao Haiyan.Determination of Manganese Dioxide in Oceanic Polymetallic Nodules[J].Rock and Mineral Analysis,1997,16(3):177-179. |
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| Authors: | Xia Yuelian Mao Haiyan |
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| Abstract: | An excess of (NH 4) 2Fe(SO 4) 2 containing H 2SO 4 is used to decompose oceanic polymetallic nodules and reduce MnO 2 in the samples. MnO 2 is determined by titrimetry with K 2Cr 2O 7. The effect of heating temperature and the time required in sample preparation on analytical results and the standardization of standards solution are discussed. The method has been applied to the determination of MnO 2 in national standard reference polymetallic nodules. The results are in good agreement with certified values with precision of less than 0.6% RSD( n =8). |
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| Keywords: | manganese dioxide polymetallic nodules volumetry reference material |
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